@media screen and (min-width:1280px) {
  .container{
      max-width: 1280px!important;
  }
}
@media screen and (max-width: 991px) {
     .header{
         display: none;
         /*background-color: white;*/
     }
    .input-so{
        display: none;
    }
    .column:nth-child(5){
        display: none;
    }
    .column:nth-child(4){
        margin-right: 0;
    }
}
@media screen and (max-width: 750px) {
    .column:nth-child(4){
        display: none;
    }
    .column:nth-child(3){
        display: none;
    }
    .column:nth-child(2){
        margin-right: 0;
    }
}
@media screen and (min-width: 992px) {
    .hidden{
        display: none;
    }
}

.row{
    position: relative;
}
.hidden{
    position: absolute;
    right: 0px;
    text-align: right;
}
.header{
    width: 100%;
    height: 30px;
    background-color: gainsboro;
}
.header-text{
    font-size: 12px;
    color: #666;
    line-height: 30px;
    text-align: center;
}
.loging{
    float: left;
    /*padding-left: 10px;*/
}
.register{
    float: right;
}
.up-info{
    height: 70px;
    line-height: 70px;
    border-bottom: 1px #eee solid;
    /*background-color: yellow;*/
}
.logo{
    vertical-align: middle;
}
.input-so{
    margin-top: 18px;
    float: left;
    position: relative;
    appearance: none!important;
    outline: none!important;
}
input{
    outline: none!important;
    appearance: none!important;
}
input:focus{
    outline: none!important;
}
.search{
    color: white;
    background-color: #0dcaf0;
    height: 38px;
    width: 50px;
    position: absolute;
    border-radius: 0 5px 5px 0;
    top: 0;
    right: -24px;
    text-align: center;
    line-height: 38px;
    font-size: 14px;
    cursor: pointer;
}
.form-control{
    appearance: none!important;
    outline: none!important;
}
.content{
    margin-top: 20px;
}
.big-box{
    display: flex;
    justify-content: center;
    /*flex-wrap: wrap;*/
}
.column{
    flex: 1;
    /*height: 600px;*/
    /*background-color: yellow;*/
    margin-right: 20px;

}
.last-colunm{
    margin-right: 0px;
    /*display: none;*/
}
.content-box{
    width: 100%;
    height: auto;
    border-radius: 10px;
    overflow: hidden;
    border: .5px #eeeeee solid;
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.pic{
    width: 100%;
    height: auto;
}
.title{
    /*color: black!important;*/
    /*max-height: 36px;*/
    /*overflow: hidden!important;*/
    /*!*white-space:normal; 单行*!*/
    /*text-overflow:ellipsis;*/
    /*text-align: left;*/
    /*display:-webkit-box; !*将对象作为弹性伸缩盒子模型显示。*!*/
    /*-webkit-box-orient:vertical; !从上到下垂直排列子元素（设置伸缩盒子的子元素排列方式）*!*!*/
    /*-webkit-line-clamp:2;!这个属性不是css的规范属性，需要组合上面两个属性，表示显示的行数。*!*!*/
}
a{
    text-decoration: none;
    outline: none;
    color: black;
    /*font-size: 16px;*/

}
.title-cl{
    color: black!important;
    font-size: 16px!important;
    color: black!important;
    max-height: 48px;
    overflow: hidden!important;
    /*white-space:normal; 单行*/
    text-overflow:ellipsis;
    text-align: left;
    display:-webkit-box; /*将对象作为弹性伸缩盒子模型显示。*/
    -webkit-box-orient:vertical; /*/从上到下垂直排列子元素（设置伸缩盒子的子元素排列方式）*/
    -webkit-line-clamp:2;
}
.content-info{
    padding: 0 15px;
    margin-top: 10px;
}
.user-info{
    margin-top: 8px;
}
.user-pic{
    width: 28px;
    height: 28px;
    border-radius: 50%;
    overflow: hidden;
    display: inline-block;
    background-color: yellow;
    vertical-align:middle;
}
.user-pic img{
    width: 100%;
    height: 100%;
    /*vertical-align: middle;*/
}
.user-name{
    display: inline-block;
    max-width: 80px;
    height: 28px;
    font-size: 12px;
    color: #2c3034;
    line-height: 28px;
    overflow: hidden;
    white-space:normal;
    text-overflow:ellipsis;
    vertical-align: middle;
    margin-left: 8px;
}
.content-xin{
    display: inline-block;
    font-size: 12px;
    color: #2c3034;
    float: right;
    vertical-align: middle;
    line-height: 28px;
}
.content-xin span::before{
    padding-right: 40%;
    cursor: pointer;
}